Form-dampening mechanism for printing-presses.



No. 643,94l. atented Feb. 20, 1900.

P J. BROOKS &. W. S. HUSON.

E. BROOKS. Ex'ecutrix 0H. BROOKS, Oecd. FORM DAMPENING MECHANISM FOR PRINTING PBESSES.

' [Application filed June 15, 1899') (No Model.) 4 Sheets-Sheet l,

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. Patented Feb. 20, I900. J. BROOKS & W. S. HUSON. O

E BROOKS, Execuirix of J. BROOKS, Decd. FORM DAMPENING- MECHANISM FOR PRINTING PBESSES.

(Application filed June 15, 1899.)

4 Sheets-Sheet 2.

(No Model.)

No. 643,94I. Patented Feb, 20, I900.

J. BROOKS &. W. S. HUSUN. E. BROOKS, Executrix of 1. anooxs, Decd. FORM DAMPENING MECHANISM. FOR PRINTING PRESSES.

(Application filed June 15, 1899.) (No Model.)

4 Sheets Sheet 3.

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N0. 643,94l. Patented Feb. 20, I900. J. BRUDKS 81. W, S. HUSUN. E. BBDDKS, Executrix of IQBBODKS, Dec'd. FORM DAMPENING MECHANISM FOR PRINTING PBESSES.

(Application filed. June 15, 1899.) (No Model.) 4 Sheets$heet 4.

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UNITED STATES PATENT OFFICE.

ELIZABETH BROOKS, EXEOUTRIX OF JOHN BROOKS, DECEASED, AND WIN- FIELD S. HUSON, OF PLAINFIELD, NEW JERSEY, ASSIGNORS TO THE ALUMINUM PLATE AND PRESS COMPANY, OF SAME PLACE AND NEW YORK, N. Y.

FORM- DAMPENING MECHANISM FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 643,941, dated February 20, 1900. Application filed June 15,1899. Serial No. 720,633. (No model.)

To all whom it may concern.-

Be it known that we, ELIZABETH Bnooxs, executrix of the estate of JOHN BROOKS, deceased, and WINEIELD S. I-IUsoN, citizens of the United States, and residents of Plainfield, in the county of Union and State of New Jersey, believe that said JOHN BRQoKs and WINFIELD S. HUSON did invent certain new and useful Improvements in Form-Dampening Mechanism for Printing-Presses, of which the following is a full, clear, and exact description.

The object of the present invention is to improve the structure and operation of the form dampening mechanism of printingpresses to prevent the ductor-roller from always coming in contact with the same line of surface of the water-fountain roller, which would form an objectionable ink-line upon the fountain-roller, and also to facilitate the regulation of the supplyof moisture from the fountain-roller to the form-dampening rollers.

The invention consists of certain features of construction, which will first be described 5 and afterward pointed out more particularly in the annexed claims.

In said drawings, Figure 1 is a rear elevation of a printing-press embodying the present invention, parts being omitted. Fig. 2 is a detail side elevation illustrating the present invention. Figs. 3 and 4 are respectively detail sectional plan and detail vertical sectional elevations of the improved form-dampening mechanism. Fig. 5 is a detail horizontal sectional view of part of the same. Figs. 6, '7, and 8 are detail views of the dnctor controlling and operating cam.

This invention has been illustrated as ap- 40 plied to a surface-printing press of substantially the same general construction as illustrated and described in an application filed by John Brooks and Winfield S. Huson October 27, 1898, Serial No. 694,682, for improve- 5 ments in printing-presses. The parts of the structure which are not described form no essential part of the present invention, but

with reference to the accompanying drawings may be fully understood by reference to said application.

1 and 2 indicate the side frames of a printing-press, in which is journaled the form or plate cylinder 3 and the impression-cylinder, which is not shown. The form-cylinder 3 though not illustrated in detail is designed to be constructed, as usual, with a segmental form-supporting surface and a segmental inkdistributing surface separated by cut-out portions, and is further provided with formclamps of any suitable construction by which the flexible form or plate may be secured in place.

11 is a main driving-gear loosely journaled upon an extension of the axle or gudgeon of the plate-cylinder 3 and having clutch connection 4 therewith. The gear 11 is suitably drivenby a small gear (not shown) and in turn drives an intermediate gear 12, which rotates a gear 13, keyed to a short shaft 13, which carries a small gear 18 meshing with a larger gear 14, keyed to the end of shaft 15, which extends from side to side of the machine and is journaled in the side frames. The shaft 15 has a bevel gear 16 keyed to its end, which meshes with a similar bevel-gear 17, keyed to the upper end of a vertical shaft' 18, journaled in bracket-bearings 19 of the side frame 1.

20 is the water-fountain roller, journaled in the side frames 1 and 2 and having keyed to one end of its axle a bevel-gear 21, with which meshes a similar gear 22, keyed to the lower end of vertical shaft 18. In this manner the water-fountain roller 20 is constantly driven from the main gear 11. The axle of the wa ter-fountain roller 20 at the gear side of the machine is extended beyond the press-frame for the reception of the Water-ductor-roller operating and controlling mechanism of improved construction.

and 26 are the form-dampening rollers, and 27 is the distributer-roller in peripheral contact with the form-rollers 25 and 26. These rollers are suitably supported with relation to the form-cylinder and each other and preferably in the manner described and illustrated in the above-named application of Brooks and Huson.

is the water-ductor roller, journaled in the forked ends of rock-arms 31, keyed to rock-shaft 32 and supported in position to be vibrated between the water-fountain roller 20 and the water-distributer roller 27 by the mechanism which will now be described.

is a rock-arm keyed to the rock-shaft 32 and supporting an adjusting-screw 36, which engages the upper edge of the rock-lever 40, which is loosely mounted upon the rock-shaft 32 adjacent to rock-arm 35 and extends rearwardly above a bracket 41, in which is sup ported an adjustable limiting-screw 42.

43 is an antifriction-roller journaled upon a stud ll, projecting from the rock-lever in the plane of an adjustable operating and controlling cam,\vhich will now be described.

is a small gear or pinion keyed to the shaft oraxle of Water-fountain roller 20, close up to the side frame 2, and 51 isa gear of the same diameter having one less tooth than the gear 50. The gears 50 and 51 mesh with an intermediate gear 53, journaled on a bearingbolt 54:, secured in the side frame 2, the gear 50 rotating gear 53,which in turn rotates gear 51. The gears 50 and 51 having unequal numbers of teeth will rotate at different speeds and move relatively to cause the ductor-roller-operating cam to rotate faster than the water-fountain roller.

is one member or portion of a divided cam j ournaled upon the water-f0 untain-roller axle and formed with hub portions 61 and 62, extending from it at opposite sides.

6+1 is a second memberor portion of the divided cam.

The cam portion 60 is formed with a con ical frictional clutch-recess 60, into which projects a conical frictional clutch member 64 of cam portion (34. A pin (38 projects from the recess 60 and engages a semicircular groove 67 in the face of clutch portion 61 to limit the movement of one portion of the divided cam upon the other. The small gear wheel or pinion 51 is mounted upon the short hub portion 61 of the cam 60 and secured thereto by pins 52.

65 is a hand-wheel formed with a tubular hub portion 66, journaled upon the hub portion 62 of cam member 60, and 64 is the second cam member, secured upon the hub portion 66 of hand-wheel 65 bya pin 69. By the operation of hand-wheel 65 the members 60 and 64 of the cam can be adjusted one upon the other. The cam member 60 is held in position upon the axle of water-fountain roller 20 by means of a nut 70, engaging threaded portion of the axle, while the cam portion 64 and operating hand-wheel 65 are held in position upon the hub portion 62 by means of a small hand-wheel 75, threaded upon the hub portion 62 and engaging a friction-washer 76. The gear-wheel 51 is connected to rotate with the cam portion 60, as above explained, and

causes the member 64: to rotate by the frictional means. The antifriction-roller 43 of rock-arm 4O rests upon the periphery of the double adjustable cam 60 61.

The operation of the improved structure will be briefly described as follows: The water-fountain roller 20is constantly rotated in the manner above described, causing the gear 50 to rotate the intermediate gear 53, which in turn rotates the gear 51 at a slightly-increased speed, because said gear 51 contains one less tooth than the gear 50. The gear 51 causes the adjustable divided cam 60 to rotate with it, and the rotation of the cam 6O 64 causes the doctor-roller to be vibrated back and forth between the water-fountain roller and the watcr-distributer roller. As the rotation of the operating and controlling cam is a trifle faster than the rotation of the water-fountain roller, it will be observed that the ductor-roller' will not operate in unison with the rotation of the water-fountain roller, but will always engage a different longitudinal line of the water-fountain roller. In this manner the formation of an in k-line upon the water-fountain roller by the transfer of the ink from the water-form rollers and distributer-roller to the water-fountain roller is avoided.

The gear 51 is shown with one less tooth than gear 50, causing the ductor-roller cam to rotate faster than the fountain-roller; but it will be clear that this arrangement may be reversed-that is, the gear 50 made with one less tooth than the gear 51and the rotation of the water-fountain roller and ductor-cam at different speeds accomplished with the same results. It will be clear to those skilled in the art that the pitch diameter of the gear having the smaller number of teeth must be a fraction less than the pitch diameter of the other gear. This difference is, however, so very slight in the size of gears shown in the .drawings that the difference in pitch diameter is not shown. In this mechanism as actually constructed the gears are respectively three and eleven-sixteenths and three and three-fourths inches outside diameter, with pitch diameters of three and seven-sixteenths and three and one-half inches, respectively, and twenty-seven and twenty-eight teeth, respectively. These figures are given merely for illustration'and are not to be taken as limiting the scope of the invention.

If it is desired to supply more or less water from the fountain-roller to the distributerroller the adjustable cam 60 64. is adjusted by moving the hand-wheel 65 forward or backward upon its bearing, forming more or less of a low portion or gap in the operating and controlling cam. By means of adjusting-screws 36 and 42 the operation of the parts can be regulated to a nicety.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is-- 1. In a printing-press, the combination of a form-cylinder with the water-form rollers and distributerroller, the water -fountain roller, the Water-ductor roller, a divided cam for operating the Water-ductor roller from the water-fountain roller adapted to vibrate the ductor-roller out of unison with the rotation of the water-fountain roller, substantially as set forth.

2. In a printing-press, the combination of a form-cylinder, the water-form rollers, the distributer roller, and the water fountain roller, and the Water-ductor roller, of a gear keyed to the fountain-roller axle, another gear loosely journaled upon said axle, one of said gears having a greater number of teeth than the other, an intermediate gear meshing With both of said gears, upon the fountainroller axle, a cam connected with and operated by said loosely journaled gear, and means for. operating the ductor-roller from said cam, substantially as set forth.

3. In a printing-press, the combination of a form-cylinder with the Water-form rollers and distributor-roller, the water-fountain roller, the water-ductor roller, a gear keyed to the axle of the water-roller, a gear 51 loosely mounted upon the axle of the Water-roller, one of said gears having a greater number of teeth than the other, an intermediate gear 53 driven by gear 50 and driving gear 51, and a cam operated by gear 51 at a slightly-different speed from the speed of rotation of the water-fountain roller, and means for operating the ductor from said cam, substantially as set forth.

4. In a printing-press, the combination of a, form-cylinder with the Water-form rollers and distributerroller, the water -fountain roller, the water-ductor roller, a divided cam comprising members and 64 having fric tional engagement with each other, means for driving the member 60 from the water-fountain roller, and a hand-wheel engaging the member 64 for adjusting it with relation to member 60, and means for operating the ductor-roller from the divided cam substantially as set forth.

5. In a printing-press, the combination of a form-cylinder with the Water-form rollers and distributor roller, the water fountain roller, the water ductor roller, the differential gears 50, 51, the former of which is keyed to the axle of the water-fountain roller, the intermediate gear 53 meshing with said differential gears and a divided cam driven by the gear 51 and operatively connected with the ductor-roller, substantially as set forth.

6. In a printing-press, the combination of a form-cylinder with the Water-form rollers and distributer roller, the waterfountain roller, the water-ductor roller, the differential gears 50, 51 the former of which is keyed to to the axle of the water-fountain roller, the intermediate gearing meshing with said differential gears 50, 51, the divided cam 60, '64, the parts of which are adjustable with relation to each other, the hand-Wheel 65 engaging one portion of the divided cam and means for operating the ductor-roller from the divided cam, substantially as set forth.

ELIZABETH BROOKS, Executrtm of the estate of John Brooks, de= 

